In particular the phase of a mode on either side of a dip is flipped degrees. Although not indicated on the calculator is the fact that modes have phase. That would be an 8 foot spread between dual subs deployed so as to NOT excite the second width mode. One example would be noticing the width mode section for the 16 foot dimension- The second width mode has a dip at both the 4 ft and 12 ft distance. Since I opened this can o'worms in another thread, I might as well finish the explanation. I've read several times that a room mode calculator provides a good place to start. Actually, I have the info as the helpful forum member gave it to me, but I like to learn too. How do I get the speaker placement for width based on the info below. Here's a pic of the calculator with my room dimensions. What I don't understand is how you calculate the speaker distance based on the results from the calculator. I got curious as to room modes, calculators, etc Ended up with the calculator. I downloaded an Excel room mode calculator after a helpful forum member started giving me speaker 'distance a part' placement suggestions based off calculations.
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